Credit Facility - Narrative (Details)	Nov. 30, 2010 USD ($)	Jul. 31, 2017 USD ($)	Oct. 31, 2016 USD ($) instrument
Line of Credit Facility [Line Items]
Net gains from cash flow hedges recorded in accumulated other comprehensive loss		$ 1,400,000	$ 200,000
Interest rate cash flow hedge gain (loss) to be reclassified during next 12 months, net		$ 600,000
Interest Rate Swap
Line of Credit Facility [Line Items]
Number of instruments held | instrument			3
Notional amount			$ 105,000,000
Derivative, fixed interest rate			1.05%
2010 Facility
Line of Credit Facility [Line Items]
Syndicated line of credit, maximum borrowing capacity	$ 800,000,000
Consolidated net worth requirement	$ 570,000,000
Consolidated net income earned requirement	50.00%
Aggregate increases in stockholders' equity requirement	100.00%
2010 Facility | Minimum
Line of Credit Facility [Line Items]
Debt covenant fixed charge coverage ratio	1.50
2010 Facility | Maximum
Line of Credit Facility [Line Items]
Debt covenant leverage ratio	3.25